Apparatus for receiving electrical oscillations.



E. E. BUTCHEFR APPARATUS vFOR RECEIVING ELECTRICAL OSCILLATIONS.

'APPUCATION FILED MAYM. 191% 1,263,204. Patented Apr. 16, 191&

- A f d UNITED STATES PATENT OFFICE.

EI MEB E. BUTCHER, F INTERLAKEN, NEW JERSEY, ASSIGNOR TO MARCONI WIRELESS TELEGRAPH COMPANY OF AMERICA, A CORPQRA TION OE NEW JERSEY.

AIPABATUS FOR RECEIVING ELECTRICAL OSCILLATIONS.

To all whom it may concern:

Be it known thatI, Emma E.'Bo'ronr.n,

a citizen of the United States, and a resident of Interlaken, Monmouth county, New

Jersey, have invented or discovered certain new and useful Improvements in Apparatus for -"Receivin Electrical 0SCll1&t10I1S,' of which the 0 owing is a specification.

The general object of my invention is to produce an apparatus suitable for the reception, detection and amplification of electrical oscillations. 7

My invention may be applied to the re- Y ceiving of electrical oscillations, no matter how reduced and irrespective of their general c aracter. It may be used for receiving both continuous or damped oscillations and may be used in any connection inwhich'it may be of service, as, for instance, in wireless or wire telegraphy, or wireless or wire telephony. Irhave shown in the drawing accompanying this specification a form which my invention may take. Since this drawing,

however, shows only one of the many ways in which my invention may be applied, it is intended to be diagrammatic and illustrative only. The illustration chosen is in connection with wirelem telegraphy, although, as I have pointed out, my invention is not confined to-this use, and I do not wish to be limited to the specific form illustrated, since it will be apparent to those skilled in the art that many changes may be made without departing from the spirit of my mvention.

One of the many advantages of my inven tion when used in connection with wireless telegraphy is that the resonant aerial circuit now used, which .involves the erection of ensive aerials masts, etc., and considerab 6 difliculty of operation intuning the aerial circuit to the received oseillations, may be dispensed with and a collector of enelrl'gy out of resonance with the received osc ationsvused.

Referrin to the drawing, I have shown at 1 a con uctor which may be the wires of a telegraph or telephone line, a telephone line being preferably used if wires are employed as a conductor. These wires may be grounded as at 2 or not. Conductors 1 form a collector of energy merely and are not in resonance with the received oscillations, their purpose being merely to intercept them and W tr n m t t ir o h d t t r, I

Specification of Letters Patent.

Application filed May 14, 1914. Serial No. 838,418.

through a battery 13 and a telephone Patented Apr. 16, 1918.

It should be understood I that wires 1,

shown in the drawing, are illustrative of any elevated conductor, that they need not be telephone or telegraph wires nor, in fact, wlres at all; nor need they be of any particular dimensions.

I have shown at 3 wires tappin the lines 1. In each of the wires 3 I pre erably insert acondenser 4, although thisoondenser is not necessary. It is, however, desirable in order to prevent interference with the other uses to which the line wires 1 may be put, either by reason of the connection of several of these wires 1 to each other, or byof my device, although I prefer touse it. Coil 6 is preferably a coil having a relatively large number of turns and a natural period approximating that of the received oscillations, and condenser 7 is preferably of relatively small ca acity.

The specific orm of trated is a multiple element valve detector of the ordinary type although it will be understood that any ot er suitable form of detecdenser and is not essential to the operation detector I have illus- I. v

tor may be used. Detector 8' consists of a sealed vessel inclosing three electrodes, a

grid electrode 9 by which it is connected to the detecting circuit; a plate electrode 10;

and a filament electrode 11. The filament electrode 11 is heated by means of a batter or other source of heat 12, and is connecte 14., to plate electrode 10. a

In the operation of my device connection is made to any convenient and suitable conductors 1, which are not tuned to the periodicity of the received oscillations. However, the circuit including the coil 6 and condenser 7, but omitting condensers 4 is tuned to the received oscillations by varying the constants in the usual manner. The batteries 12 and-.13 are adjusted to give a maxiresponse in the telephqili 14.

When arranged and operated as I have described it signals may be received and detected without in any way interfering with the ordinary uses of the conductors to which the detector has been attached.

What I claim is:

1. In an apparatus for receiving electrical capacity in series.

3. In an apparatus for receiving electrical oscillations a collector of energy out of resonance with the received oscillations, a local detector circuit associated therewith, said circuit being tuned to the periodicity of the received oscillations and contain ng an inductance consisting of a 0011 having a natoscillations,

naeaaoe ural geriod'approximating that of the recelve oscillatlons, a capacity and a detector in series and a capacity intervening between the collector of energy and the local detector circuit.

4. In an apparatus'for receiving electrical a grounded collector, an open local-circuit including a detector, and a. condenser connected between said collector and said local circuit.

5. In an apparatus for receiving electrical oscillations, a collector, an open local circuit including a detector, said local circuit including a capacity and inductance, said detector, capacity and inductance being connected in series, and a condenser between said collector and said local circuit.

In witness whereofI have hereunto signed my name in the presence of two witnesses this 13th day of May, 1914.

I ELMER It. BUTCHER.

Witnesses: 1

WALTER S. Jonas, WM. M. Earn. 

